The present invention provides a technology capable of performing control such that ranging is performed more reliably in a mobile object and a portable device which is a regular communication partner. Provided is a communication device mounted on a mobile object including an acquisition unit configured to acquire a ranging trigger signal for starting measurement of a distance between the communication device and a portable device carried by a person and a communication control unit configured not to start ranging communication for measurement of the distance based on a fact that first specific information defined in advance and necessary for determination of the mobile object does not match second specific information included in the acquired ranging trigger signal and necessary for determination of the mobile object.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The communication device according to claim 1, wherein the communication control unit considers the portable device not to be a suitable portable device and does not start the ranging communication based on the fact that the first specific information does not match the second specific information.
3. The communication device according to claim 1, wherein the communication control unit considers the portable device to be a suitable portable device and starts the ranging communication based on the fact that the first specific information matches the second specific information.
5. The communication device according to claim 1, wherein the communication control unit starts the second ranging communication by controlling transmission to the second portable device of a second ranging request which is a signal for making a request for measurement of the second distance.
6. The communication device according to claim 1, wherein the communication control unit starts the second ranging communication by waiting for reception of a ranging signal which is a signal used to measure the second distance from the second portable device.
7. The communication device according to claim 1, wherein the communication control unit transitions to the reception waiting state based on success of authentication of the first portable device before the acquisition of the first ranging trigger signal and cancels the reception waiting state based on a fact that a predetermined time passes from the transition to the reception waiting state.
8. The communication device according to claim 1, wherein the communication control unit does not start the first ranging communication by not controlling transmission of a first ranging request which is a signal for making a request for measurement of the first distance to the first portable device.
9. The communication device according to claim 1, wherein the communication control unit does not start the first ranging communication by not responding with a second ranging signal corresponding to the first ranging signal even when the first ranging signal which is a signal used to measure the first distance is received from the first portable device.
10. The communication device according to claim 1, wherein the communication control unit starts the first ranging communication based on the fact that the first specific information matches the second specific information included in the first ranging trigger signal.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
March 18, 2022
November 26, 2024
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